Paper folding machine



Gd 113 193R. 0, KLElNSCHMiT 1,827,589

PAPER FOLDING MACHINE Filed March 6, 1930 Fig.2.

INVE NTOR AT TORNEYS;

Patented on 13,1931

UNITED STATES PATENT OFFICE OSCAR KLEINSCHMI'I, OI" LEIPZIG-PLAGWITZ, GERMANY, ASSIGNOR TO GEBRUDER BREHMEB, IASCHINEN-FABRIK, OF LEIPZIG-PLAGWITZ, GERMANY rune ronnmo moi-111m Application filed March 6, 1830, Serial No. 483,884, and in Germany November 2, 1929.

In paper folding machines in which the sheets are fed between feed rollers into guides or pockets for forming folds with associated folding rollers by the well known buckling process the outer ends of the upper and lower bars that constitute in the form of a grid, the aforesaid ockets are usually brought as close as possible to the feed rollers, but .a small clearance space must be left to allow for the slight movement apart of the rollers when the sheet is fipassed between them. This space is quite su cient to permit of the passage of a paper sheet so that it sometimes ha pens that in the event of the front edge of a sheet turning up or down when it leaves the rollers the sheet is liable to pass under or over the pocket through the clearance space aforesaid with the result that the rollers are clogged and the smooth working of the machine is hindered.

This disadvantage is overcome according to the present invention and the sheets are guided with certainty into the pocket by extending the bars of the pocket frame to pass between the adjacent operative rollers so that in themselves they form guides for the sheet, the ends of the extended bars being preferably curved so that in the case of the u per bars they present with the surface 0 the feed table a funnel-shaped guide for the sheet to the feed rollers and in the case of the lower bars they ensure the passage of the sheet from the feed rollers into the pocket obviating its passage between the ends of the lower bars and the periphery of the folding roller associated with the lower feed roller and preventin it from fouling the lower P bars which sometimes happens with the present construction of pocket.

This extension of the lower bars is, however, not essential as the object aimed at can be equally well attained by lowering the folding roller so that the sheet will pass into the pocket even if its edge be turned down when it leaves the feed rollers.

The nature of the invention will be more clearly understood by reference to the accompanying somewhat diagrammatic drawings in which similar reference characters relate to like parts in both figures.

Figure 1 shows the feed rollers and associated folding roller and the entrance to the pocket.

Figure 2 is a plan view of the same parts.

In the said drawings the reference letter a represents the feed table, I) the upper feed roller, 0 the lower feed roller, d the upper bars of the pocket frame e the lower bars, f the pocket and g tllQfOldlIlg or buckle rollerthat is associatedwith the lower feed roller 0 to form the first fold in the well known manner.

As reviously indicated and as will be clear rom the drawings according to the present improvements the upper bars (1 are extended to pass between the feed rollers b and c the roller 6 being grooved or reduced in diameter as shown at h to allow for the passage of the bars d without interference to the feed of the sheet bet-ween the rollers b 76 and c. The ends of the bars at are preferably curved or bent upwardly as shown at 70 so that they form with the fiat surface of the feed table a a funnel shaped guide or series of guides to the sheet passing to the feed rollers b and c and ensure its passage into the pocket f.

The lower bars e may also be extended to pass between the rollers c and g as shown in dotted lines in Figure 1, the roller 9 being grooved or reduced in diameter for this purose.

What I claim is 1. In a folding machine, having feeding rollers and a folding roller, upper and lower pocket frame bars having extensions passing between the adjacent operative feeding and folding rollers.

2. In a foldingmachine, having feeding rollers, upper pocket frame bars having ex- 90 tensions passingebetween the feed rollers one of said rollers ing grooved to allow of the passa e of said bars and the outer ends of said are bein curved to present flmnel shaped guides or the aper sheet.

3. In a foldin mac ine, having folding rollers, lower poc et frame bars havin extensions passin between the folding ro lers, one of said r0 ers being grooved to allow of the. passa e of said bars, and the outer ends of said fiars being curved to conform to the periphery of said grooved roller.

In testimony whereof I afiix m signature.

OSCAR KLEIN CHMIT. 

